Heater Core: Service and Repair

HEATER CORE

2.8L V6 (LB6):

2.5L 4cyl (LR8):

3.8L V6 (LN3):

Remove or Disconnect

1. Drain cooling system.
2. Coolant hoses at the heater core.
3. Heater duct and the heater case side cover. (covers the heater core hose tubes)
4. Heater lower outlet.
5. Two (2) housing cover to air valve housing clips.
6. Housing cover.
7. Core retaining straps.
8. Core tubing retainers and remove the core.

Install or Connect

1. Core and the core tubing retainers.
2. Core retaining straps.
3. Housing cover.
4. Two (2) housing cover to air valve housing clips.
5. Heater lower outlet.
6 Heater duct and the heater case side cover. (covers the heater core hose tubes)
7. Coolant hoses at the heater core.
8. Refill the cooling system, start engine, check for leaks.